Continuity mistake: When Trish is putting some of her old toys away in a brown paper bag, she picks up her dog teddy. In the first shot the ear of the dog teddy is folded upwards, lying on it's head. In the reverse shot the ear hangs down, normally. (00:02:30)
Continuity mistake: When Trish's parents are leaving in the car, Trish's mom tells her to not forget to lock the doors and windows. Between shots, Trish's stance and the position of her arms and hands on the window changes. (00:03:30)
Continuity mistake: When the two boys are walking away from the telephone repair woman's van, one of the boys drops a book, and hands his friend two folders, and picks up his book. Suddenly in the next shot the friends hands are empty, and the two files are back in the other boys hands. (00:05:15)
Continuity mistake: When Russ Thorn grabs the telephone repair woman and drags her into the van, she drops her appointment book on the ground. In the next shot of the boys walking away from the van, the book that's supposed to be on the ground has disappeared. (00:05:15)
Continuity mistake: When Russ Thorn chases Linda down the corridor, she runs right to the end of the corridor, then heads down the last row of lockers, and Russ follows her (there is also no poster on the wall.) In the next shot of Russ running down this row of lockers, it's now apparant that it's not the end row; because there is no end wall, and now there is also a poster on the wall behind him. (00:13:00)
Continuity mistake: When Linda is hiding from Russ in the showers, the position of the white towel on the side changes. (00:13:35)
Continuity mistake: When the PE coach arrives home from school, her friend drills a peephole through her door. The hole in the door is rough and ugly, yet in the next shot it's neater and has gained a metal eyepiece. (00:18:10)
Continuity mistake: When Trish is speaking on the phone to Diane, she winds up a pair of toy wind-up shoes. In the first shot the toy shoes walk as far as the center of the desk, then run down. In the next shot, they are now right at the edge of the desk. (00:18:50)
Continuity mistake: When Trish knocks a glass of wine to the floor, whilst preparing the food, the spillage decreases between shots. (00:20:55)
Continuity mistake: In the shot where Russ Thorn watches as Kimberly and Jackie walk up the steps to Trish's porch, Kimberly's hands are empty. But when she enters the house, she holds up a case of beer in her right hand. (00:22:40)
Continuity mistake: When Valerie is making the jug of Kool-Aid, she puts the bag of sugar down on the counter, standing perfectly upright. In the next shot, when Courtney comes over, the top of the bag of sugar is folded down, and then during the scene, it changes back and forth. (00:24:00)
Continuity mistake: When the Pizza Man rings the doorbell, Trish puts her glass of strawberry shake on the tray that Jackie is holding. In this shot three glasses are on the tray. However in the very next shot, there are only two glasses on the tray, and Kim now has one glass in her hand. (00:44:50)
Continuity mistake: After the pizza man is discovered dead, Kim puts the phone down on the desk before running into the living room. While Coach Jana waits on the line, it goes dead. In the next shot, Trish picks up the phone and speaks to an operator just before Russ Thorn cuts the phone line. (00:45:20)
Continuity mistake: When the Pizza Man falls through Trish's doorway, dead, between shots his position changes, and so does the position of his pizza box. Also, the greasy stain on the pizza box changes shape, and blood on the pizza box disappears too. (00:45:35)
Continuity mistake: When Valerie is on the phone with Coach Jana, Courtney's hair is up. When Neil is banging on Bates's front door, Courtney's hair is pulled back. Throughout the rest of the movie, Courtney's hair remains up. (00:46:30)
Continuity mistake: When Coach Jana is cut across the chest by Russ, blood gets on her tee-shirt that says "Speedo", between the two E's. In the next shot, as she falls to the floor, that blood has vanished. (01:07:45)
Continuity mistake: When Valerie slices Russ's chest, he falls into the swimming pool. After he climbs back out, and attacks Valerie and Courtney, he is now suddenly completely dry, despite having fallen into the pool seconds ago. (01:09:50)
Continuity mistake: When Diane walks through the garage she enters the yard without closing the garage door. Later, they enter the garage and the door is closed.
